The compatibility issues with the PS3 are not as bad as you seem to be making out. A large proportion of PS2 games will still run perfectly well with no problems.

And most of the games with problems don't stop you playing the games. For Example Gran Turismo 4 only crashes if you leave it looping the games into movie for 4 times or more. Not something you will probably be doing if you have loaded it up to play. Others have minor graphical or audio glitches such as a few vertical strips appearing at a certain point in a game. All are a bit annoying but you can still play the games.